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Do baby pictures reveal anything about the personalities of the adults that will one day rule the world? Decide for yourself by taking a look at these fascinating photos of classic showbiz icons as babies. Pictured: Tony Curtis, born Bernard Schwartz in the Bronx in 1925, at 6 months old. (Already, it seemed, he was pretty proud of his physique.) (Hulton Archive/Getty Images/LIFE.com) Visit LIFE: Your World in Pictures

The little girl who grew up to get stabbed to death in Psycho was born Jeanette Helen Morrison in Merced, California, in 1927. (Pictorial Parade/Getty Images/LIFE.com) Visit LIFE: Your World in Pictures